This is a front-end for the Online Encyclopedia of Integer Sequences, made by Christian Perfect. The idea is to provide OEIS entries in non-ancient HTML, and then to think about how they're presented visually. The source code is on GitHub.
%I A195656 #21 Aug 28 2024 13:06:51 %S A195656 53248,233476,1257754,7682812,51698178,378088270,2980927200, %T A195656 25173962492,226268016376,2149806985106,21437333168798, %U A195656 222770819826574,2396574908171782,26535227773186536,300870737118178194,3479000496509382748,40885324678195409820 %N A195656 Number of ways to place 12n nonattacking kings on a 24 X 2n cylindrical chessboard. %C A195656 This cylinder is horizontal: a chessboard where it is supposed that rows 1 and 2n are in contact (number of columns = 24, number of rows = 2n). %H A195656 Alex V. Breger, <a href="/A195656/b195656.txt">Table of n, a(n) for n = 1..500</a> %H A195656 Max A. Alekseyev, <a href="/A195656/a195656.txt">Denominator of the generating function</a> %H A195656 Artem M. Karavaev, <a href="http://zealint.ru/koroli-na-cilindricheskoj-doske-predlozhenie.html">Zealint blog</a> (in Russian) %H A195656 V. Kotesovec, <a href="https://oeis.org/wiki/User:Vaclav_Kotesovec">Non-attacking chess pieces</a> %H A195656 Vaclav Kotesovec, <a href="/A195656/a195656_1.txt">Generating function</a> %H A195656 <a href="/index/Rec#order_4248">Index entries for linear recurrences with constant coefficients</a>, order 4248. %F A195656 Recurrence order is 4248. %Y A195656 Cf. A137432, A195653, A195654, A195655, A195651, A195661. %K A195656 nonn %O A195656 1,1 %A A195656 _Vaclav Kotesovec_, Sep 22 2011